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Bomb hits Athens stock exchange Bomb hits Athens stock exchange
(41 minutes later)
An explosion outside the Athens stock exchange has caused minor damage to the building, Greek police said. A bomb has exploded outside the Athens stock exchange, slightly injuring a female passer-by woman and damaging the building, police say.
They said the blast - which also set eight cars on fire - was caused by an "explosive device". The bomb - which set fire to several cars - was hidden in a stolen van.
"The blast was strong, but damage to the building was minor," a police official told Reuters news agency. Another bomb went off outside a government building in Thessaloniki, causing minor damage and no injuries.
Media reports said a newspaper had been warned about the blast. Greece has been dogged by unrest since police shot a teenager last December. The blasts may be the work of a Greek extremists' group, Revolutionary Struggle, says the BBC's Malcolm Brabant in Athens.
The death sparked Greece's worst riots in decades, leading to clashes between police and protesters in the weeks that followed. Left-wing groups have claimed several attacks. Earlier this year the group claimed responsibility for two bombs aimed at the American Citibank group.
The BBC's Malcolm Brabant in Athens says there has been a lull in violence over the summer. Flying glass
But he adds Wednesday morning's blast is a clear message from domestic militants to Greek Prime Minister Costas Karamanlis that they have not gone away. A warning of the Athens explosion was telephoned to a local newspaper, enabling police to seal off the area in the west of Athens before the bomb went off.
Police initially said it had caused only minor damage. But later reports said windows at the bourse had been blown out, and a neighbouring car dealership had been damaged along with nearby trees and parked cars.
One passing woman was slightly injured by flying glass.
The bomb in Thessaloniki caused minor damage around the ministry responsible for Greece's two northern provinces of Macedonia and Thrace.
In a letter to a satirical newspaper, Revolutionary Struggle had promised more attacks against economic targets.
It said: "We need to rid ourselves for good of all the scum of economic and political power so that humanity can free itself from these criminals."
Greece has been dogged by unrest since police shot a teenager last December.
The death sparked the country's worst riots in decades, leading to clashes between police and protesters in the weeks that followed.